Global Patent Index - EP 1004544 A4

EP 1004544 A4 2000-08-16 - OPERATION MANAGEMENT METHOD OF IRON CARBIDE PRODUCTION PROCESS

Title (en)

OPERATION MANAGEMENT METHOD OF IRON CARBIDE PRODUCTION PROCESS

Title (de)

VERFAHRENSFÜHRUNG FÜR DIE PRODUKTION VON EISENCARBID

Title (fr)

GESTION DE LA PRODUCTION DE CARBURE DE FER

Publication

EP 1004544 A4 (EN)

Application

EP 98905668 A

Priority

  • JP 9800793 W
  • JP 4551597 A

Abstract (en)

[origin: WO9838130A1] An operation management method of a production process for obtaining an iron carbide having a target composition in two stages of reaction procedures, comprising conducting a second reaction operation for executing remaining reduction and carburization operations after a first reaction operation for partly reducing an iron-containing raw material for producing iron, collecting a solidified sample at an outlet of a reaction furnace after the first reaction operation, measuring a reaction rate of the solidified sample, and controlling an IC rate after the second reaction operation by controlling parameters capable of changing the reduction rate of the first reaction operation.

IPC 1-7 (main, further and additional classification)

C01B 31/30; B01J 8/24; C21B 13/00; C21B 15/00; C22B 5/14; G01N 27/72

IPC 8 full level (invention and additional information)

C01B 31/30 (2006.01); C21B 13/00 (2006.01); C21B 15/00 (2006.01)

CPC (invention and additional information)

C21B 13/0033 (2013.01); Y02P 10/136 (2015.11)

Citation (search report)

  • [A] LU 62514 A1 19710810
  • [A] US 5366897 A 19941122 - HAGER JOHN P [US], et al
  • [A] PATENT ABSTRACTS OF JAPAN vol. 007, no. 028 (C - 149) 4 February 1983 (1983-02-04)
  • [A] DATABASE INSPEC [online] INSTITUTE OF ELECTRICAL ENGINEERS, STEVENAGE, GB; HIRANO S ET AL: "Synthesis and magnetic properties of iron carbide (Fe/sub 3/C)", XP002140178, Database accession no. 3850471 & JOURNAL OF THE JAPAN SOCIETY OF POWDER AND POWDER METALLURGY, APRIL 1990, JAPAN, vol. 37, no. 3, pages 421 - 425, ISSN: 0532-8799JOURNAL OF THE JAPAN SOCIETY OF POWDER AND POWDER METALLURGY, APRIL 1990, JAPAN3730532-8799421425
  • See also references of WO 9838130A1

Designated contracting state (EPC)

AT BE DE DK ES FR GB IT LU NL SE

EPO simple patent family

WO 9838130 A1 19980903; AU 6117198 A 19980918; AU 722716 B2 20000810; BR 9812415 A 20000905; CA 2269913 A1 19980903; CN 1242755 A 20000126; EP 1004544 A1 20000531; EP 1004544 A4 20000816; JP 3157478 B2 20010416; JP H10237523 A 19980908; US 6270741 B1 20010807; ZA 9801523 B 19980828

INPADOC legal status


2001-06-20 [18W] WITHDRAWN

- Date of withdrawal: 20010426

2000-08-16 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20000629

2000-08-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE DE DK ES FR GB IT LU NL SE

2000-08-09 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7C 01B 31/30 A, 7C 21B 15/00 B, 7C 21B 13/00 B, 7C 22B 5/14 B, 7G 01N 27/72 B, 7B 01J 8/24 B

2000-05-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990923

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE DE DK ES FR GB IT LU NL SE